Use the equation \[c = \lambda v\]
Where c is the speed of light \[3.00 \times 10^8\] and
\[\lambda\] is the wavelength
To solve for velocity (v).
Once you have solved for velocity v, use the equation:
\[E = hv\]
Where E is energy, h is Planck's constant \[6.626 \times 10^-34 (J/s)\] , and v is velocity in order to solve for E.